US3782315A - Method and apparatus for producing a stepped rim on a seamless can body - Google Patents

Method and apparatus for producing a stepped rim on a seamless can body Download PDF

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Publication number
US3782315A
US3782315A US00166464A US3782315DA US3782315A US 3782315 A US3782315 A US 3782315A US 00166464 A US00166464 A US 00166464A US 3782315D A US3782315D A US 3782315DA US 3782315 A US3782315 A US 3782315A
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US
United States
Prior art keywords
mandrel
roller
spring
circular end
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00166464A
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English (en)
Inventor
W Passenheim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto Switzerland AG
Original Assignee
Alusuisse Holdings AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
Application granted granted Critical
Publication of US3782315A publication Critical patent/US3782315A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/12—Edge-curling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/263—Flanging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/30—Folding the circumferential seam
    • B21D51/32—Folding the circumferential seam by rolling

Definitions

  • the inner rimming roller must, for this purpose, be at least smaller than the internal diameter of the can to be rimmed, which results in a point engagement with the can wall at the beginning of rimming and then a line engagement of the width of the rimming roller in the end phase of rimming.
  • a stepped rim of precise measurements cannot be made by such a method.
  • the diameter in this area is enlarged to a significant amount, which leads to large tensions in the material, these being effective in the direction of the centre of the can.
  • Such can bodies may be closed with a flanged lid and by a folded seam formed with the stepped rim, the diameter of the circumferential lid tearing line of the flanged lid being greater than the clear diameter of the can body.
  • the tearing line lies thereby fully on the step of the stepped rim, but only in such a way that a full opening of the tear-off lid is permitted, thus unobstructing the emptying of the contents of the can.
  • the device for making the stepped rim includes a rimming mandrel and a profile roller cooperating with the mandrel, which are radially displaceable relatively to one another and can be pressed against one another, and in which at least one part is displaceable eccentrically in a transverse direction to the longitudinal axis of the mandrel of the profile roller respectively against the pressure of a spring.
  • FIG. 1 is an axial section of a can body of sheet metal with a stepped rim
  • FIG. 3 shows the mandrel, partly in elevation, and partly in longitudinal section
  • FIG. 4 shows the pressure roller in longitudinal section
  • the seamless can body 1 of sheet metal consists of a wall 2, a shaped bottom 3, and a stepped rim 4 on the upper edge of the wall 2.
  • the body 1 can be prepared by impact extrusion, or by deep drawing and rolling, and may have a protective lacquer on the inner and/or outer sides.
  • the can body 1 can have a height which is greater than its own diameter.
  • TI-Ie can body 1 is finally closed by a flanged lid 5, known per se, which is connected with the stepped rim 4 by a folded seam 6.
  • the outer edge 7 of the stepped rim 4 must for this purpose be of such a width that the part 8 of said edge overlapping the lid flange amounts to at least 55 percent of the said outer edge.
  • a mandrel 11 which has a main cylindrical part 12 for the reception of the can body, and a part 3., which includes an offset shoulder 14. Both said parts are mounted on a shaft 15.
  • the part 13 is fixed on the shaft 15 by a nut 17 screwed on to a threaded part 16.
  • the cylindrical part 12 is displaceable eccentrically relatively to the shaft 15.
  • the cylindrical part 12 is provided with internal conical surfaces 18 and 19 which interengage with conical rings 20 and 21, which are displaceable axially on the shaft 15 and are under the action of a compression spring 22 placed between them and which surrounds the shaft.
  • the cylindrical part 12 is prevented from displacement in the direction of the longitudinal axis.
  • the cylindrical part 12 engages the fixed part 13 and on the other hand a ring 19a carrying the conical surface 19, and with it the cylindrical part 12, is confined by a ring 23, which is fixed to the shaft 15 by a screw 24.
  • the pressure roller 25 of FIG. 4 has two parts, 27 and 28, fixed on a shaft 26, the part 27 being drawn up tightly against a sleeve 29 which abuts the part 28, by means of a nut or the like (not shown) provided on the shaft. Between the parts 27 and 28 there is an annulus 30, which is mounted to be radially displaceable. The annulus 30 has on its inner periphery an oblique face 31, which interengages with a conical surface 32 on an axially displaceable ring 33, which is under the action of a spring 34. The axial travel of the bush 33 is limited by an abutment 35 on the sleeve 29.
  • a coupling part 36 which Iocates the can axially during deformation.
  • the mandrel 11 and the pressure roller 25 cooperate as follows As shown in FIG. 5, the can body with its wall 2 in undeformed condition, is pushed on to the mandrel 11 so that the wall 2 reaches to the part 13, overlapping the offset shoulder 14. The mandrel and pressure roller rotate in opposite directions. Then the pressure roller 25 is shifted towards the mandrel as indicated by the arrow 37 until the roller 25 comes into engagement with the can wall 2.
  • the part 28 Upon further radial displacement of the roller 25, the part 28 applies force to the radially displaceable part 12 of the mandrel 11 through the can wall, in the direction of the arrow 38, until the cylindrical part 12 has shifted eccentrically relatively to the shaft 15, into a position in which, in end view, the part 12 is tangential to the offset shoulder 14 (FIGS. 6 and 6a).
  • a simple rim 39 is rolled. That is to say, a first zone of the can wall 2 is deflected into a radially outward directed position.
  • the left hand radial face of the annulus 30 (as seen in FIGS.
  • a cylindrical portion of can is created having a diameter greater than the majority of the can wall, and joined to it by a radial step.
  • material flows into the cylindrical portion from the rim 39 which up till then has been too long.
  • the width of the rim continuously reduces.
  • the plane of the left hand of the roller part 28 (as seen in FIGS. 5, 6 and 7) is slightly offset to the right relatively to the plane of the left hand end of the manr lr rt L V
  • the final result is an exact and dimensionally stable stepped rim.
  • the progress of production of the stepped rim thus divides itself into two stages: namely, the rolling of the rim and a pressing of the step as a deformation process through continuous flow of material from t s maler ster iaa y formed-
  • the shafts of the roller and mandrel move apart, and the parts 12 and 30, in accordance with the speed of the stroke, return themselves to their positions centered on their shaf ts
  • the finish fcan body is then removed from the mandrel. This can take place pneumatically by supply of compressed air through a bore 15a in the shaft 15 of the mandrel 11.
  • both the mandrel and the roller may be driven or only the mandrel, the roller being idle.
  • the invention has been described in the case of a cylindrical can body.
  • Apparatus for producing a stepped rim on a seam less can body comprising a mandrel adapted to receive the can body, and a pressure roller adapted to engage,
  • the first spring means comprises an axially acting compression spring, and two rings abutting opposite ends of the spring, each engaging the main mandrel part on a frusto-conical surface.
  • the second spring means comprises an axially acting compression spring, an abutment on the first roller part engaging one end of the spring, and a ring abutting the other end of the spring, the ring engaging the second roller part on a frusto-conical surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00166464A 1970-07-31 1971-07-27 Method and apparatus for producing a stepped rim on a seamless can body Expired - Lifetime US3782315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1158570A CH510474A (de) 1970-07-31 1970-07-31 Verfahren und Vorrichtung zur Herstellung von Dosenunterteilen aus Blech

Publications (1)

Publication Number Publication Date
US3782315A true US3782315A (en) 1974-01-01

Family

ID=4374903

Family Applications (1)

Application Number Title Priority Date Filing Date
US00166464A Expired - Lifetime US3782315A (en) 1970-07-31 1971-07-27 Method and apparatus for producing a stepped rim on a seamless can body

Country Status (6)

Country Link
US (1) US3782315A (enExample)
CH (1) CH510474A (enExample)
FR (1) FR2099713B1 (enExample)
GB (1) GB1348287A (enExample)
NL (1) NL7110274A (enExample)
SE (1) SE387258B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341103A (en) * 1980-09-04 1982-07-27 Ball Corporation Spin-necker flanger for beverage containers
CN104858335A (zh) * 2014-10-31 2015-08-26 东莞市满贯包装有限公司 一种食品易拉罐结构与加工工艺
CN109335196A (zh) * 2018-12-14 2019-02-15 重庆友鹏包装制品有限公司 F304#铁/铝扩颈锥形拉伸午餐肉方形两片罐及生产工艺
US12291372B2 (en) 2023-03-17 2025-05-06 Belvac Production Machinery, Inc. Metal container with a carrier ring and methods of making the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US620202A (en) * 1899-02-28 l white
US3299680A (en) * 1965-06-10 1967-01-24 Earl A Thompson Rolling machine for forming tubular workpieces

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2131027A (en) * 1937-01-22 1938-09-27 Mullins Mfg Corp Method and apparatus for working sheet metal articles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US620202A (en) * 1899-02-28 l white
US3299680A (en) * 1965-06-10 1967-01-24 Earl A Thompson Rolling machine for forming tubular workpieces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341103A (en) * 1980-09-04 1982-07-27 Ball Corporation Spin-necker flanger for beverage containers
CN104858335A (zh) * 2014-10-31 2015-08-26 东莞市满贯包装有限公司 一种食品易拉罐结构与加工工艺
CN109335196A (zh) * 2018-12-14 2019-02-15 重庆友鹏包装制品有限公司 F304#铁/铝扩颈锥形拉伸午餐肉方形两片罐及生产工艺
US12291372B2 (en) 2023-03-17 2025-05-06 Belvac Production Machinery, Inc. Metal container with a carrier ring and methods of making the same

Also Published As

Publication number Publication date
FR2099713B1 (enExample) 1976-03-26
SE387258B (sv) 1976-09-06
CH510474A (de) 1971-07-31
GB1348287A (en) 1974-03-13
FR2099713A1 (enExample) 1972-03-17
NL7110274A (enExample) 1972-02-02

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